浙江大学齐东莲等：一种基于并网模式下级联H桥蓄电池储能系统的分布式VSG控制方法

原创英文期刊编辑部全球能源互联网期刊 2022-09-01 08:00

摘要

随着可再生能源的高度普及，电力行业面临着抑制功率波动和惯性支撑能力等新的挑战。电池储能系统在可再生能源集成中起着至关重要的作用。本文提出了一种基于级联H桥变换器的电池储能系统在并网模式下的分布式虚拟同步发电机（VSG）控制方法。VSG不依赖于通信，并使用分布式平均算法实现荷电状态（SOC）平衡控制。由于SOC变化速度较慢，分布式通信网络的带宽要求降低，可以降低成本。综上，本文所提出的方法可以同时提供惯性支持和精确的SOC平衡。该方法的稳定性利用根轨迹分析进行了证明。最后，在不同条件下进行的仿真，验证了该方法的有效性。

A distributed VSG control method for a battery energy storage system with a cascaded H-bridge in a grid-connected mode

一种基于并网模式下级联H桥蓄电池储能系统的分布式VSG控制方法

Yichi Cai1, Donglian Qi1

(Electrical and Electronic Engineering Department, Zhejiang University, No.38. Zheda Rd. Hangzhou, 310027, Zhejiang, P. R. China)

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A Distributed VSG Control Method for Battery Energy Storage

Abstract

With the high penetration of renewable energy, new challenges, such as power fluctuation suppression and inertial support capability, have arisen in the power sector. Battery energy storage systems play an essential role in renewable energy integration. In this paper, a distributed virtual synchronous generator (VSG) control method for a battery energy storage system (BESS) with a cascaded H-bridge converter in a grid-connected mode is proposed. The VSG is developed without communication dependence, and state-of-charge (SOC) balancing control is achieved using the distributed average algorithm. Owing to the low varying speed of SOC, the bandwidth of the distributed communication networks is extremely slow, which decreases the cost. Therefore, the proposed method can simultaneously provide inertial support and accurate SOC balancing. The stability is also proved using root locus analysis. Finally, simulations under different conditions are carried out to verify the effectiveness of the proposed method.

Keywords

VSG, Cascaded H-bridge converters, Battery energy storage system, Renewable energy integration.

Fig.1 Structure of the cascaded H-bridge-based BESS

Fig.2 Communication topology of the cascaded H-bridge-based BESS

Fig.3 Proposed control scheme for the cascaded

Fig.4 Root locus of J (increases from 450 to 550)

Fig.5 Root locus of D (increases from 1200 to 1800)

Fig.6 Root locus of k (increases from 10000 to 20000)

Fig.7 Simulation results in discharging mode

Fig.8 Simulation results in charging mode

Fig.9 Simulation results when transferring from charging mode to discharging mode

Fig.10 Simulation results under grid-frequency drop

本文引文信息

Cai YC, Qi DL (2022) A distributed VSG control method for a battery energy storage system with a cascaded H-bridge in a grid-connected mode. Global Energy Interconnection, 5(4): 343-352

蔡翼驰，齐东莲 (2022) 一种基于并网模式下级联H桥蓄电池储能系统的分布式VSG控制方法. 全球能源互联网（英文）, 5(4): 343-352

Biographies

Yichi Cai

Yichi Cai is working towards B.Eng. degree at Zhejiang University, Hang Zhou, China. His research interests includes renewable energy.

Donglian Qi

Donglian Qi received the Ph.D. degree from the School of Electrical Engineering, Zhejiang University, China, in 2002. She is currently a Full Professor and a Ph.D. Advisor with Zhejiang University. Her current recent research interest covers intelligent information processing, chaos system, and nonlinear theory and application.

编辑：王彦博

审核：王伟

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A distributed VSG control method for a battery energy storage system with a cascaded H-bridge in a grid-connected mode

浙江大学 齐东莲等：一种基于并网模式下级联H桥蓄电池储能系统的分布式VSG控制方法

郑重声明

浙江大学齐东莲等：一种基于并网模式下级联H桥蓄电池储能系统的分布式VSG控制方法